[antauth]

I prefer the simplicity of Twitter: I don't want pictures, I don't want video, I just want the info. (The only reason I'm on Facebook is because I am a college student and my peers are all on there.) I also feel that Twitter better facilitates useful information exchanges which is harder with the clutter of Facebook.

As far as the urban audience, I think one of things that makes Twitter a little closer to MySpace is that ability to customize your background. I think that might be a part of it, but certainly not all of it.